// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/base/l10n/l10n_util_win.h"

#include <windows.h>

#include "base/win/win_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"
#include "ui/gfx/win/dpi.h"

typedef PlatformTest L10nUtilWinTest;

TEST_F(L10nUtilWinTest, TestDPIScaling)
{
    // Baseline font for comparison.
    NONCLIENTMETRICS_XP metrics;
    base::win::GetNonClientMetrics(&metrics);
    LOGFONT lf = metrics.lfMessageFont;
    l10n_util::AdjustUIFont(&lf);
    int size = lf.lfHeight;
    float rounding = size < 0 ? -0.5f : 0.5f;

    // Test that font size is properly normalized for DIP. In high-DPI mode, the
    // font metrics are scaled based on the DPI scale factor. For Windows 8, 140%
    // and 180% font scaling are supported. Simulate size normalization for a DPI-
    // aware process by manually scaling up the font and checking that it returns
    // to the expected size.
    lf.lfHeight = static_cast<int>(1.4 * size + rounding);
    l10n_util::AdjustUIFontForDIP(1.4f, &lf);
    EXPECT_NEAR(size, lf.lfHeight, 1);

    lf.lfHeight = static_cast<int>(1.8 * size + rounding);
    l10n_util::AdjustUIFontForDIP(1.8f, &lf);
    EXPECT_NEAR(size, lf.lfHeight, 1);
}